In the manufacturing of latex (rubber) threads, thermal treatment is a crucial step. The threads need to be dried and then cured to stabilize their elasticity and durability. This process takes place in tunnel ovens operating between 50°C and 170°C, and requires a stable, breathable, and heat-resistant conveyor system.
Polyester Spiral Mesh Belts are widely used in this application due to their excellent heat resistance, air permeability, and mechanical strength. These belts are not only responsible for transporting the rubber threads but also ensure uniform heat and air exposure during drying and curing.
Drying and curing of rubber threads occur in two distinct stages:
- Drying Oven: 50°C to 130°C
- Curing Oven: 100°C to 170°C
Polyester spiral belts used in this industry are specially produced to tolerate these conditions. Unlike standard polyester mesh belts, these belts are heat-set and stabilized during manufacturing to maintain dimensional stability and strength at elevated temperatures.
These belts are not off-the-shelf products — they are specially manufactured for latex thread lines, starting from customized yarn selection to high-temperature thermal treatment in production.
Based on field experience, it is strongly recommended to use big loop spiral mesh belts for latex thread drying and curing.
- Higher Air Permeability: Large loops provide increased open area, allowing better airflow through the belt.
- Improved Drying Efficiency: Hot air reaches all sides of the thread uniformly, ensuring faster moisture removal and consistent curing.
- Preferred by Industry: This design is the most commonly used structure in rubber thread processing lines worldwide.
Big loop belts increase drying and curing efficiency by maximizing hot air exchange and minimizing thermal resistance.
Normal polyester materials degrade faster under high humidity and heat. To combat this, the spiral mesh belts for rubber threads are made using hydrolysis-resistant polyester yarn, which significantly improves lifespan under high-temperature, high-moisture conditions.
This ensures:
- Longer operational life in humid ovens
- Reduced frequency of belt replacement
- Better mechanical performance during thermal expansion
To avoid the buildup of static electricity, which can interfere with product quality or even pose a fire risk, antistatic wires are inserted every 10 cm across the belt width. These conductive yarns safely dissipate static charges generated during operation.
| Feature | Description |
| Material | Hydrolysis-resistant polyester monofilament |
| Operating Temperature | Up to 170°C (short-term peak), continuous up to 150°C |
| Spiral Loop Sizes | 5 mm, 7 mm, 10 mm, 12 mm (big loop preferred) |
| Filler Yarn | Optional – controls permeability and surface contact |
| Antistatic Wire | Embedded every 10 cm |
| Edge Reinforcement | Heat-sealed or stitched for durability |
| Customization | Available in endless or pin-joined designs |
- Excellent Airflow for fast and even drying
- Stable at High Temperatures with heat-set polyester structure
- Custom Design for specific oven widths and thread types
- Seamless and Smooth Surface for gentle thread support
- Static Protection through conductive wire integration
- Long Lifespan in humid and thermal environments
Polyester spiral mesh belts are widely applied in:
- Drying Tunnels (50–130°C): Using big loop belts for moisture evaporation
- Curing Ovens (100–170°C): Stable thermal resistance for elastic stabilization
- Combined Tunnel Ovens: Continuous belt runs through drying + curing zones
- Post-curing Conveyance: Safe cooling and transport to packaging stations
Polyester Spiral Mesh Belts are a mission-critical component in rubber thread production. Their performance directly impacts drying efficiency, curing consistency, and product quality. Specially engineered from hydrolysis-resistant polyester, with integrated antistatic wires and optimized for airflow via big loop designs, these belts have become the industry standard for drying and curing applications.
